Multipolar oil-break switch



July yl, 1930. H. KERGEL l1;76,9s1

KULTIPOLAR OIL BREAK SWITCH Filed Aug. 7, 1924 s sums-sheet 2 July" l, 1930- H. KERGEL 1,768,961

MULTIPOLAR on. BREAK swITcH Filed Avg. 7, 1,924 sjsheets-Sheet 3 Patented July 1, 1930 UNITED STATES PATENT oEFicE HERMANN KERGEL, OF DRESDEN, GERMANY, ASSIGNOR TO THE FIRM 0F SACHSEN- WERK, LICHT- UND KRAFT-AKTIENGESELLSCHAFT, OF NIEDERSEDLITZ, NEAR DRESDEN, GERMANY MULTIPOLAR OIL-BREAK SWITCH Application led August 7, 1924, Serial No. 730,577, and in Germany October 8, 1923.

This invention relates to a multipolar oil break switch particularly adapted for use on high voltages, and the object of the invention is the provision of a switch of this type having a transverse or crossbar carrying knife blades or other contacts, and which is operated from a single point so that all the contacts are simultaneously actuated, as will be hereinafter more particularly described.

In the drawing Figure 1 is an elevation of a multipolar oil break switch made in accordance with my invention.

Fig. 2 is a plan of the same showing the cap or cover removed.

Fig. 3 is a view similar to Fig. 1 showing another form of the invention.

Fig. 4 is a plan of the structure shown in Fi 3.

4ig. 5 is a sectional elevation of a third form of the invention.

Fig. 6 is a plan of the same.

Fig. 7 is a sectional elevation of a fourth form of the invention, and f F1 8 is a plan of the same.

Reerring to the drawings and particularly to Figs. 1 and 2, the device made in accordance with my invention as therein illustrated comprises a lurality of insulating tubes a inclined in t e form of a pyramid and connected at their upper ends in a hub and at their lower ends by brace bars b. At the lower end of each of the insulating tubes a the same is fitted with a contact knife d or other form of contact. The upper ends of the insulating tubes a or the hub in which they are connected are mounted to slide on a guide rod g. The upper ends of the insulating tubes a arepivotally connected to one end of a link c, the opposite or upper end of which is pivotally connected to a lever f as indicated at the pivotal or Working point e which is the sole means of simultaneously actuating the insulating tubes and the knife blades or other contacts carried thereby.

By this structure as will be readily apparent, the apparatus may be designed to work on any voltage and to effect a substantial saving in the use of oil and of economy in space because of the compactness of the device.

In Figs. 3 and 4 the insulating tubes a are employed in sets, each comprising tubes disposed at an angle to each other and each set of tubes being connected to vthe hub h in positions spaced at-1200. The tubes a carry the knife blade contacts and slide on the guide rod g and are also connected by a link c to the operating lever f in a manner similar to ythat hereinbefore described. In this structure in order to further obviate the possibility of short circuits, the device may be provided with insulating partition walls indicated at 2.

In order torensure a more positive and quicker operation of the switch particularly in breaking the circuit, the guide rods as shown in Figs. 5 to 8 inclusive may be provided with a spring member 7c cooperating between a nutl and the hub by which the insulating tubes and Contact members slide on the guides '51. The tension of the spring lc may be regulated by adjusting the position of the nut l with which it cooperates, thereby also controlling and determining the speed with which the switch may be f 'caused'to open. Also referring particularly toFigs. 7 and 8, it will be seen that instead of employing a single guide tube a pair of the saine maybe employed, and ofcourse, obviously, the number of guide members employed forms no part of the present invention. It will also be understood that inasmuch as the actuatingspring member are placed inside these guide members, the guide members act as protectors for the springs when the spring mechanism is used.

Iy claim as vmy invention: 1. In a multi-polar oil break switch for use in high tension plants, a vessel, a 4centrally disposed guide member, a liub slidable on the said guide member, frame of pyramidal form comprising an angular base and arms connected at corresponding ends to tlie corners of tlie base, extending upvvardlj and connected at their opposite ends to t-lie said hub, bridging members connected to and carried at tlie corners ot tlie said base and tbe loiver end of tlie said arms, a plurality of fixed terminal contacts, and a unitary means Yfor actuating tlie said liub and frame for moving the said bridging members relativciy to the said fixed terminal contacts.

ln a multi-polar oil break svviteli for use in liigli tension plants, a vessel, a centrally disposed guide member, a liub slidable on tlic guide member, a pyramidal frame comprising a triangular base and tubes of insulating material extending from tlie corners ot tlie said base upwardly to and connected vfitli tlie said liub, a set of bridging members eacli connected. at a corner oi' the said triangular base, a plurality ot fixed terminal contacts, and a unitary means for actuating tlie said nnb and pyramidal frame for moving tlic said bridging members relatively to the s l fixed terminal contacts.

ln a limiti-polar oil break svfitcli for use in liigli tension plants, a vessel, a liollovv centrally disposed guide member, a liub momited to slide on tlie said guide member, a pyramidal frame comprising an angular base and a plurality ot arms connected at corresponding ends to tbe corners of tlie said angular base and extending upwardly tliereirom with the opposite ends secured in tlic said liub, a plurality of bridging members connected 'to and carried by the base or" tlie said pyramidal frame at the corners thereof, a corresponding number ot fixed ter'` :nal contacts, means .vitliin tbe centralty disposed guide cooperating ivitli the said liub and its pyramidal iframe for accelerating tire movement thereof in one direction, and a unitary means for actuating the said l'iub and pyramidal frame for moving the aid bridging members relatively to the iixed terminar contacts.

l. ln a multi-polar oil break sivitcli for use in liigli tension plants, a Vessel, a liol- .low centrally disposed guide member, a bub mounted to slide on tlie said guide member, a pyramid l frame comprising a triangular base and a plurality o't arms connected at Correspondiiigiends to tbe corners of the said triangular base and extending upwardly therefrom ivitli the opposite ends secured in tbe said liub, a plurality of bridging members connected to and carried by the base of tire said pyramidal frame at tne corners thereof', a corresponding number of ixed terminal contacts, a spring contained vvitliin the said bellow centrally disposed guide 

